Second partial sums of eighth powers (A001016).

Terms

a(0) =1a(1) =258a(2) =7076a(3) =79430a(4) =542409a(5) =2685004a(6) =10592400a(7) =35277012a(8) =103008345a(9) =270739678a(10) =652829892a(11) =1464901802a(12) =3092704433a(13) =6196296120a(14) =11862778432a(15) =21824228040a(16) =38761435089a(17) =66718602714a(18) =111659333380a(19) =182200064046a(20) =290563654073a(21) =453803117636a(22) =695353566480